[Solved]

Question

So i just started using pointers in c++ and i came up with a problem ... So what i need to do is take a number from a 2D array and sum it with a number below example we have a 2D array :
4 3
1 2 3
3 4 5
5 6 7
8 9 6
Then the answers would be :
1 + 3, 2 + 4, 3 + 5,
3 + 5, 4 + 6,5 + 7,
5 + 8 , 6 + 9, 7 + 6
So i wrote a program that kinda works... It shows the correct answer however there's an segmentation error....
Program:

https://code.sololearn.com/caHS98LDz6cz/?ref=app

Answer 1

You allocated for an array a space of *n elements. Its last index is *n - 1. But in line 49 you access to element with index *n:
(a + (i + 1))

i is iterates from 0 to *n - 1, and on the last step of loop i becomes *n - 1, so
(a + (i + 1)) = a + *n, which contains address of garbage value.
Change condition of for-loop in line 43 to *n-1, you should not iterate over last row of the array.